Cooking apparatus.



R. M. G. PHlLLlPS. 000mm; APPARATUS APPLICATION FILED AUGJU, m4.

Patented. Nov. 23, 1915. 4 SHEETS-SHEET 1.

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R. M. G. PHILLIPS. COOKING APPARATUS APPLICATION FILED AUGJO, 1914. I v

Patented Nov. 23, 1915.

4 SHEETS-5;;ET 2.

COLUMBIA PLANDGR AIN C0..WASHINHTON. D. C

R. M. G. PHILLIPS. COOKNG APPARATUS APPLICATION FILED AUG.IO. 1914.

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.COLUMBIA PLANOORAPH CO.,\VASHINDTON, n. c.

" apparatus in their open positions.

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COOKING Arrhenius.

Specification of Letters Patent.

Patented Nov. 23, leis.

Appncati'on mea August 10,1"914. s'efiafivofs5'e045.

To all whom it may concern Be it'known that 1, Ross G. PHILLIPS, acitizen of the United States, residing at West Haven, in the county ofNew Haven and State of Connecticut, have invented a new and usefulImprovement in Cooking Apparatus; and I do hereby declare the following,when taken in connection with the accompanying drawings and thecharacters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawings CQilStlttltG part ofthis application and represent, in

Figure 1 a view partly in right hand side elevation and partly invertical section, of a cooking apparatus constructed in accordance withmy invention, the food-compartment'being sealed. F i 2 an underside viewthereof, the legs being broken away. Fig. 3 a broken view in verticalsection of the lower end of the food compartment on the line a .7) of Fi2 and showing the shutter of the ingress air passage in its closedposition. Fig. 4 a bro-kendetail view showing the means for raising theouter end of the shutter against its seat. Fig. 5 a broken view in frontelevation of the lower end of the apparatus showing the preheater in itscentered position. Fig. 6 abroken detail sectional view of thebL'irner-swivel. Fig. 7 a broken detail view in vertical section showingthe lower end of the timing apparatus, and showing the means employedfor.

holding the shutter and the damper of the Flg. 8 a-view in right handside elevation showing a cooking apparatus of the oven type with myimproved means applied to 1t. Fig. 9 a plan view thereof. F1g.10 abroken view in vertical section on the llne cZ of Flg.

'7 showing the dam oer eni 310 ed to close the air egress passage ofthe-modified apparatus. Fig. 11 a broken detail v ew showmg therelief-valve with which the valve 71 closing the egressdraft-passage isprovided. Fig. 12 a correspondmg view of thereliefvalve with which thedamper of the modified form shown in Figs. 8, 9 and 10 is provided.

My invention relates to an improvement in cooking apparatus of the typein which a food-compartment vis provided with ingress and egressdraft-passages which are automatically closed for the sealing of thecompartment after the samehas been heated for a predetermined time, theobject being to produce a simple, convenient and eco no'n'iicalapparatus of the character de-' scribed. i

.lVith these ends in view, my invention consists in a cooking apparatushaving o'ertain details of construction and combinations of parts aswill be hereinafter described and pointed outin the claims.

Incarryingout my invention as shown in 1 to 7 inclusive, I employ. anormally stationary but removable, cylindrical foodcontainer 2 having acooking-coinpartment 3, formed in its bottom with a concentric ingressdraft-passage 4 and provided with a double-walled insulatedcover havinga concentric egress draft-passage 6. As shown, thefoodcontainer 2 has aninner wallfor shell 7 and outer wall or shell 8, the annular spacebetween these walls being filled with any suitable insulating material9, such as a compound of asbestos.

The inlet draft passage 4. is closed and sealed by meansof ahorizontally arranged closure or shutter having oscillating and verticalmovement. The said shutter is furnished at its inner end with adependinghub l1 turning upon a "stud 12 upon which it is held by a nut13 applied to the threaded,

lower end of the said stud the upper end of which is screwed into theedge of a circular plate lit formed upon its lower face with an annula'rsealing-rib 15 which is set into a circular opening 16 ronaeain arectangular sheet metal. base 17 supported upon legsv 18. The said plate14- is formed initsupper face with a shallow, circular recess 191 c?ceiving an insulating ring 20 of asbestos or other. material upon whichthe food-container 2 is seated as clearly shown in Fig. 3. The said hub11 is enci cled a helical spring 21 arranged to, exert a constant effortto swing the shutter 10 into position to close the ingress draftpassage4, this swinging lnovei'nent being arrested by a stop-lug 22 upon thelower faceof the platelet.

Provision is made-for a slight vertical movement of the hubll upon thestud 12 so that the spring 21 eXert s an upward pressure on the shutterfor the purposeof firmly seating the upper face thereof against thesealing-rib 15. This p lfpvlslql l for ,the vertical moveinent of theshutter. also makes its oscillating movement easier, compensates forwear and inetjuali'tie's of fitting.

ter against the rib '15, I by preference provide the outer end of theshutter with a .liftin'g finger 23 which engages with a spring-finger 24securedby screws 25 to the lower face of the plate 14, and shaped to actas a lifting-cam when the finger 23 rides up over it, whereby the outerend of the shutter islifted just before it comes to a stop and jammedagainst the lower face of the sealing-r1615. For the same purpose, Iemploy a corresponding lifting-finger 26 fastened by screws27 to thebase 17 and arranged in po sition to lift theinner end of the shutterjust before the same comes to a stop. The screws 25 and 27 pass upwardthrough the base17 into theplate14, but this detail is immaterial. I V

For oscillating the shutter, I employ, as shown, a link 28 pivoted to itnear its hub 11 and connected with the arm. 29 of a bellcrank leverfastened to the lower end of a rockshaft 30 the upper end of which isprovidedwith a lever .31 connected with the rear end of a horizontallink 32 the forward end of'whi chis pivoted to the inner end of anoperating-rod or manual 33 passing through the lower end of the casing34 of a timing mechanism and furnished at its projecting forwardpendwith an operating-handle 35. Toprovlde for automatically shutting offthe gas simultaneously with the closing of the draft-passages 4 and 6,the saidlink 32 is formed with a slot 36 receiving a couplingstud 37carried by an arm 38 connected with the valve-plug 39 of a gas-cock 40entered at one end by agas-supply pipe 41 and having its opposite endconnected by an elbow 42 with a short nipple 43 entering a chamberedbracket 44 depending from the base 17 to ,which it is fastened. The saidbracket 44 is formed with a depending tapering trun- 45 the trunnion 45,and being held thereupon nion 45 upon which a yoke-like burner-carr er46 turns as a swivel, the said burnerca'rrler havlng a tapered openingto receive by a screw 47. short nipple 48 mounted in the burner-carrier46 enters a' mixingchamber 49 locatedat the outer end of an arm 50 ofthe preheater or burner 51 which is additionally supported by means of aheavy wire frame 52 held in place by lugs 53 upon the bottom of theburner, and having their outer ends fastened in the respec tive arms ofthe burner-carrier 46, one end of the wire being furnished with a handle54 by means of which the burner is manually swung into its heating andlighting positions, it being necessary, or at least highly desirable, toadapt the burner to be swung to one s deaway from the food-containerintothevop en air at the time of lighting it to avoid danger of explosiondue to a possible accumulation of air and gas in the food-contamer Thesaid bracket 44 is formed, as

is provided to offset this excess of movement.

To provide for closing the egress air-passage 6, in the cover 5,simultaneously, or substantially simultaneously with the closing of theingress draft-passage 4-, the short arm 57 of the bell-crank leveraforesaid is connected with a rearwardly extending link 58 attached tothe crank-arm 59 of a rock-shaft 60 ournaled in brackets 61, 62, uponthe under face of the base 17. At its inner end, the said rock shaft 60is provided with a liftingarm 63 engaging with the lower end of avertically arranged lifting-rod 64 inclosed in a vertical tube 65resting at its lower end upon the base 17. The pro ecting upper end ofthe rod 64 carries a yoke 66 receivingbetween its arms the outer end ofa rockinglever 67 hung on a stud 68 in a bracket 69 fastened to the topof the cover The inner end of the lever 67 has mounted in it, the stem70 of a suitable valve 71 closing the egress draft-passage 6 in thecover As shown, the stem 70 is provided with a knob 72. he said cover 5is held in place upon the food-container 2 by pivotal clips 73 of anyapproved construction.

Instead of fastening the lifting-arm 63 directly to the rock-shaft 60,itis mounted loosely thereupon, and furnished with a stop-finger 63co-acting with a corresponding stop-finger 63 formed upon a collar 63fastened upon the shaft 60, the said fingers 63 and 63 being normallyheld in contact by a helical spring 63 encircling the shaft 60 andengaged at one end with the under face of the arm 63, and at the otherend fastened to the shaft. The train of parts employed to close thevalve 71 have a movement in excess of the movement required to merelyseat it, this excess of movement being compensated for by the spring 63which, as the movement of the parts passes the amount required to seatthe valve, results in the separation of the stop-fingers 63 and 63*,leaving the valve 71 seated under the tension of the spring 63.

To provide for automatically closing the ingress and egressdraft-passages 4 and 6 and for shutting off the fuel-supply at apredetermined time, I employ as herein shown, a timing apparatus whichmay, however, be replaced by any automatic means, such, for instance, asa thermostat. The timing-apparatus herein shown is constructed on theprinciple of the timing apparatus fully shown and described in mypending application filed August 1st, 1913, Serial No.

782,245, and therefore need not be detailed herein.ilhesaidtimingapparatus so far as hereinshown, isinclosed in axcasin '34mounted upon theright hand cornerofzthe front of thebase 17 It isprovided with a graduated timing-dial (Fig. 5) :sweptby :a pointer 75 atthe:upperiendsofsa'setting lever .76.]1ung upon the projecting outer endof a center-arbor ,77 and provided .at 'its lower end with a handle .78.Thesaidarbor 77 carries .a timing-disk :80 having :radial timing-slot81' receiving a timing-pin 82 moiuited in a itimingdever 83 hung .uponastud 84 and :furnished at its opposite end with a handle 85 projectingthrough asegmental slot 86 in the casing 34. The said timing-lever 83 isconnected by a link 87 with a releasing-lever or :trigger 88 hung upon a:pivot 89, provided with .a forestalling handle 90 projecting throughthe casing '34, .and formed with a notch 91 which, as it were, shutsdown into a trigger-notch 92 in the operating rod as shown in Fig. 7, sothat the shoulder 93 of "the notch "92 i'nay be brought to a bearingupon :the adj acent face of the lever 88 which acts as a latch forholding the shutter in :its open position with respect to the ingressdraft-passage 4, and the valve 71 in its open position with respect tothe egress draft-passage 6, and

also acts to maintain the gas-cock in its open position. At theexpiration of the time to which the timing apparatus has been set bymeans of the setting lever 76, a spring 94 lifts the timing-lever 83through a distance represented by :the length of the slot 81, wherebythe link 87 abruptly lifts the lever 88 out of engagement with theshoulder 93 of the rod 33 which-is now retracted by a helical spring 95,the outer end of the rod at this time moving through a bore 96 in thebase 97 of the casing 34 as shown in Fig. 7.

As herein shown, the cylindrical food-com tainer 2, though normallylocked upon the base 517, is adapted to be removed therefrom byits-provision at itslower end with locl ing-pins 98 which are enteredinto. inclined channels in the upper ends of retainlng-arms 99 castintegral with the plate 14.

Preferably I employ a thermostone 100 supported above the bottom of thefood-compartment 3 upon steps 101 by means of which it is raisedsufficiently not to interfere with the ingress draft. As shown, thethermostone 100 provides a mounting for a foodrack 102 provided at itsupper end with a thermostone 103. Either or both of the thermostones maybe employed as desired, or both may be dispensed with. The food rack 102as shown, has handles 104.

In the modified construction shown by Figs. 8 to 10 inclusive, myinvention is shown as applied to a cooking apparatus of the stationaryoven type. As shown, a rec'- tangular double-walled insulated oven 105on legs 106 is formed in its {bottom with an ingress"draft passage 107,and-in the middle of-itsupper-rear edge with'an egress draftpassage 108.The said passage 10? is closed and sealed by an oscillating and liftingshutter 109, *while the passage 10S is closed and sealed by a closure.in the form of a damper 110.

iFor the-operation of the 'shutter 109, 1 employ a link 1111 pivoted toit and at its opposite :end to an arm 112 on the lower end of a verticalrock-shaft 113 provided at its upper :end with an arm 114 connected by alink 115 with the reduced latch portion 1 16 of an operating-rod 1 17entering thecasing 118 of-a timing mechanism o f any approvedconstruction, the said latch portion 117 of 'the rod being provided witha setting-handle 119. The rock-shaft 113 is also provided with an arm120 connected by a link 12 1 to a cranlearm 122 at the upper end of thevalve-plug 123 of a gas-cock 124 entered ibya. gas-pipe 125 connected byan elbow126 anda T-connection 127 with agassupply pipe 128. At itsopposite end, the gas-cock 124 is attached to an elbow 129 connected bya. nipple 130 with a fitting 131 formed with a tapering-trunnion 132 onwhich the burner-carrier 133 is swiveled, the details of thegas-passages in the "trunnion and carrier being the same as alreadydescribed. The said burner-carrier 133 carries a short nipple 134entering a. mixingchamber 1 -35 at the outer end of a burnera-rm 136 theinner end of which terminates in the burner or preheater 137 which is inpart supported by a heavy wire frame 138 the inner ends of which passthrough the rm-s of the said burner-carrier, one end of the wire ibein-gextended to form the handle 129. The shutter 109 .is provided with ahelical spring 140'by means of which it is swung into its closedposition. The same means may be employed for lifting the shutter 1 09 asalready shown and described. For the closure of the egress draft-passage108, the link 115 is furnished with a swiveled head 141 connected by along rod 142 v with an arm 143 upon a rock-shaft 144 adapted toraisethe'damper or closure 110.

\Vithout going further into details, it will be understood that in themodified or oven form of my apparatus, the ingress and egressdraft-passages and the gas-cock are simultaneously operated at theexpiration of av predetermined time for the sealing of the oven, theingress draft-passage being sealed by means of a shutter interposedbetween the said passage and a preheater located on the outside of theoven.

The two forms of apparatus are, however, substantially the same andoperate on the same principle. The details of this construction'may, ofcourse, be widely varied without departing from my invention. The

ing a vent-passage 156.

modified form of my improved apparatus [as shown in Figs. 8 to 10'inclusive is not shown as furnished wlth thermostones,'but

it may befurnished with either, the upper or thelower, or both upper andlower thermostones as shown for the apparatus of the preceding figures.Y

By preference, thoughnot necessarily, the valve 71 employed {for theclosure of the egress draft-passage 6' (Fig. 1) is provided with arelief-valve to permit the escape of steam rising from the food. Asshown in Fig. 11. this relief-valve comprises a ballvalve 14 5 held inplace bya plate 146 having-a seat 1&7 and a vent 14:8, The ball 145 islocated in a valve-chamber 149 opening into a vent passage 150 in thevalve-stem 70. The relief-valve shown in Figs. 10 and: 12 consists of athreaded nipple 151 mounted in the damper 110 and having arelief-passage 152 opening into a valvechamber 153 containing aball-valve 154.

supported by a cup 155 screwed upon the projecting lower end ofthe-nipple and hav- The two reliefvalves shown by Figs. 11 and 12 may,of course, be replaced by relief-valves of different character andconstruction, and may be omitted altogether if desired.

1. In a cooking apparatus, the combination with a itood-compartmenthaving an ingress draft-passage, of a. heater, a closure interposedbetween the said passage and heaterand having movement in one directionfor closing the said passage, and movev ingress draft-passage, or aheater, a closure interposed between the. said passage and heater andmovable in one planefor closing the said passage and in a'plane at aright angle ;to its closing movement forsealing the said passage,cocking means for maintaining the closure in its open position,

means for automatically releasing the cocking means to permit theclosure to close, means for moving the closure intoits closed andsealing position, and means for manually opening the said closure andfor setting the said cocking means subject to the action of the saidreleasing means.

3. In a" cooking apparatus, the combina tlon with a food-compartmenthaving a heat ingress passage, of a heater movable into heating and.lighting positions with respect to the said passage, a closureinterposed between the heater and passage for closing the latter, meansfor automatically controlling the closing movement of the said closure,and means for manually opening the said closure to permit the use of theheater in heating the compartment.

at. In a cooking apparatus, the combination with a food compartmenthaving an ingress draft-passage, of a heater, a closure interposedbetween the said passage and heater and having swinging and right linemovement, cocking means for .maintaining the closure in its openposition, means for automatically releasing the said cocking means topermit it to swing into its closed position, and means for manuallyopening the said closure and setting the said cocking means subject tothe releasing action of thesaid automatic releasing means.

5. In a cooking apparatus, the combination with a food compartmenthaving an ingress draft-passage, of a heater, a closure interposedbetween the said passage and heater and having closing movement in oneplane and sealing movement in another plane, cocking means formaintaining the said closure in its open position, means forautomatically releasing the cocking means to permit the closing of theclosure, means for manually opening the said closure and setting thesaid cocking means Subject to the action of the said automatic releasing means,

and a .fuehvalve for the heater adapted to be manually opened, and to beautomatically controlled in being closed to accord with the closing ofthe said closure.

6. In a cooking apparatus, the combina tion with a food compartmenthaving an ingress draft-passage and an'egress draftpassage, of a heater,a closure interposed between the said ingress draft-passage and theheater, and having closing movement in one direction and sealingmovement in another direction, cocking means for maintaining the closurein its open position, means for automatically releasing the said cockingmeans to permit the closure to close, and means for manually opening thesaid closure and setting the cooking means subject to the releasingaction of the said automatic releasing means.

7. In a cooking apparatus, the combination with a food compartmenthaving an ingress draftpassage, of a heater, a closure interposedbetween the said passage and heater and having swinging movement in theplane of the passage for closing the same, and right line movement tothe plane of the passage for sealing the same, cocking means formaintaining the closure in its open position, means for automaticallyreleasing the said cocking means to permit the closing and sealingmovements of the closure, and means for manually opening the saidclosure and setting the said cockmg means subJect to the releaslngaction of the said automatic sealing means.

8. In a cooking apparatus, the combination with a food-compartmenthaving a heat-ingress passage, of a heater, a closure interposed betweenthe said passage and heater, cam mechanism for moving the closureagainst the said passage at the end of its closing movement, means forautomatically controlling the closing movement of the said closure, andmeans for manually opening the closure to permit the use of the heaterfor heating the food-compartment.

9. In a cooking apparatus, the combination with a food compartmenthaving an ingress draft-passage and an egress draftpassage, ot' aheater, a closure interposed between the said heater and ingressdraftpassage and having movement in one direction for closing the saidpassage and movement in another direction for sealing the same, aclosure for the egress draft-passage, cocking means for maintaining thesaid closures in their open positions, means for automatically releasingthe cooking means to permit the closing of the said closures, means formanually opening the said closures and setting the said cocking meanssubject to the action of the automatic releasing means,

and a gas-valve automatically controlled in closing by the saidreleasing means and adapted to be manually opened.

10. In a cooking apparatus, the combination with a food compartmenthaving an ingress draft-passage, of a heater, a closure interposedbetween the said passage and heater and having movement in one directionfor closing the said passage and movement in another direction forsealing the same, cocking means for maintaining the closure in its openposition, means for automatically releasing the said cocking means topermit the closure to close, means for manually opening the said closureand set- ,ting the cooking means subject to the action of the saidreleasing means, and a fuel-valve automatically controlled in beingclosed to accord with the closing of the said closure and adapted to bemanually opened after the setting of the said cocking means.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

ROSS M. G. PHILLIPS.

Witnesses:

CLARA L. WEED, HAROLD D. PEARSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

